Hi All,
I believe it is permissable to only Register a Copyright once as it states on the PA form with some exceptions. After that it is Registered. If you register a collection of several songs be sure to keep a good record if you don't list each song Title on the Registration.

If you assign a copyright on a song in a collection that is the only song a Publisher has rights to. All the other songs are still free to do what you wish or assigning another song to a different publisher.

A publisher doesn't re-copyright your song if it is released for public sale. It is the songwriter's duty to register the copyright.

A Record Label may Register a CD of which may have songs on it by several different writers on the SR form of which protects the sound recording only.

If there are complications of who owns a copyright somewhere down the road and you never registered your copyright it can get very sticky. Keep things simple and neat. You don't have to be a U.S. Citizen to register your copyrights with the Library of Congress.

Ray E. Strode